The process of using a computer to collect data through sensors, analyze the data and save and output the results of the collection and analysis. Data logging also implies the control of how the computer collects and analyzes the data
http://www.webopedia.com/TERM/D/data_logging.html
http://en.wikipedia.org/wiki/Data_logger





https://play.google.com/store/apps/details?id=com.cellbots.logger&hl=fi

external image datalog1.gif

Sensors: Data that is to be recorded by a data logging system is gathered using sensors. A sensor is a device which measures a physical quantity such as the temperature and then sends a voltage to the computer representing the quantity. Sensors can be either analogue or digital
http://www.hollyfield.kingston.sch.uk/gcseit/GCSE/datalog.htm

sensors in computers:
http://windows.microsoft.com/en-us/windows7/Using-location-and-other-sensors


U.S army uses smartphones for field data collection



Sensors:A sensor is a device which measures a physical quantity such as the temperature and then sends a voltage to the computer representing the quantity.

Analogue: The sensor can measure a wide range of values

Digital: sensors are either on or off

Probes: A probe is a program or other device inserted at a key juncture in a network for the purpose of monitoring or collecting data about network activity.